I read a book about CIA operations against China in the 1940s and 50s. Hundreds of people died, a bunch of American agents were imprisoned for literally decades

I read a book about CIA operations against China in the 1940s and 50s. Hundreds of people died, a bunch of American agents were imprisoned for literally decades and when Mao told the international press that imperialists were trying to destabilise China even the UK ambassador had to admit it was true.